PC video modes missing

[Nash]

Hello,

I'm on Pi5 8go, Retropie, Bookworm Lite 64bit.

I tried to force disable 4K everywhere, manipulate firmware/config.txt and cmdline.txt. I think adding "video=HDMI-A-1:1280x720@60" in cmdline.txt worked, but now I don't have pc resolutions anymore in runcommand menu.

Few days later, I rollback cmdline.txt to re-enable 4K to restore full list of video modes but the 4K and intermediate PC resolution like 800x600 did not reappear in the list. There is only TV resolutions from 480p to 1080p. I tried to restore old firmware/config.txt backups and change "hdmi_force_hotplug", "hdmi_group" and "hdmi_mode" values but nothing change.

What did I miss?

[mitu]

@Nash said in PC video modes missing:

I tried to restore old firmware/config.txt backups and change "hdmi_force_hotplug", "hdmi_group" and "hdmi_mode" values but nothing change.

The hdmi_ options have no effect on the recent RaspiOS (bullseye/bookworm) releases. Can you post the output of the following commands:

kmsprint -m
cat /proc/cmdline

[Nash]

@mitu I tried on another screen (4K), all video modes reappeared. I put the first screen back, all modes are still there, even 4K resolutions. I don't understand how it works.

My goal is to have all PC and TV video modes up to 1920x1080 (even if screen doesn't support some of them), having completely disabled 4K.

Do you think it is possible?